The base of a triangle is increased by 66.6% and the altitude is decreased by 40%, then the change in the area of the triangle is ?
3 Answers
Explanation:
Let the original base of the triangle be b and height be h.
After altering the triangle,
Explanation:
Suppose that the base and altitude of the triangle are
units, resp.
Then, its area
The base
Similarly, the new altitude
Explanation:
#"note that "66.6%~~2/3" and "40%=2/5#
#"original area "=1/2bh#
#"new area with "b=5/3b" and "h=3/5h#
#"new area "=1/2xx5/3bxx3/5h=1/2bh#
#"the area remains unchanged"#